Which description is not right for blast cell? ( )
A. Big Cell size
B. Fine Chromatin
C. Predominant Nucleoli
D. Abundant Cytoplasm Cytochemical cell differentiation
POX stain is very useful to distinguish( ).
ALL and AML
B. ALL and CLL
C. AML and CML
D. AA and IDA
在双缝干涉实验中,设缝是水平的.若双缝所在的平板稍微向上平移,其它条件不变,则屏上的干涉条纹 [ ]
A. 向下平移,间距不变;
B. 向上平移,间距不变;
C. 不移动,但间距改变;
D. 向上平移,间距改变.
把双缝干涉实验装置放在折射率为n的水中,两缝间距离为d,双缝到屏的距离为D (D>>d ),所用单色光在真空中的波长为l,则屏上干涉条纹中相邻明纹之间的距离是 [ ]
A. λD / (nd);
B. nλD/d;
C. λd / (nD);
D. λD / (2nd).
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